The warrior may fight for gold or for an immediate gain, or for something to take home for the winter to feed the family. The soldier is part of a more complex society. He's fighting for a group ethic of some sort.

How the original 'Cosmos' affected me personally was long-term. I wasn't born early enough to see the original series, but after getting a hold of it in my teen years, it was one of the driving forces behind my passion for science.

Life for me in Los Angeles required medication. I spent nine years being sad and down in the dumps. L.A. doesn't work with my chemistry.

There are a lot of books about how to get organized and a lot of books about how to be better and more productive at business, but I don't know of one that grounds any of these in the science.

I don't know the science behind climate change. I can't say one way or another what is the direct impact, whether it's man-made or not.